422 Mr. J. 11. Mallocli on Exotic Muscaridee. 



Genus Papuaia, nov. 



Generic characters. — Similar to Dichcetomyia, differing in 

 having the pteropleura bare, the hypopleura with some long 

 hairs on n])per margin in front of spiracle, metathoracic 

 spiracle without setulose hairs overlying spiracular flap, and 

 the prealar bristle absent. The anterior intra-alar bristle 

 is absent in the only specimen I have before me. 



Genotype, Mi/dcea rufescens, Stein. 



The specimen bears labels similar to those borne by 

 Dicluetomyia bifasciata., Stein, but the name is Aricia 

 ochromyoides, Walker, MS. 



Genus Spilopteromyia, nov. 



Generic characters. — Similar to Papuaia. Differs from 

 it in having the hypopleura bare. Prosternum bare ; ptero- 

 ))leura with some hairs in centre, scutellum with the hairs 

 invading ventral surface from the sides; no hairs along 

 lower margin of metathoracic spiracle ; third wing-vein 

 setulose at base below ; anterior intra-alar and prealar 

 present, but not strong; fourth vein distinctly bent forward 

 at apex ; hind tibia without postero-dorsal bristles, the apical 

 dorsal bristle very short. 



Genotype, Sjnloyaster apicata, Stein. 



I have before me two specimens from Colombia, South 

 America {Dr. A. Balfour). 



In order to make clear the distinctions between the three 

 genera just dealt with, I append a synopsis of the characters 

 for their separation. All have the pteropleuia hairy in 

 part : — 



1. Prosternum with hairs on sides; meta- 



thoracic spiracle with setulose hairs 

 along lower maigin and overlying the 



spiracular flap Divhatomyia, Malloch. 



Prosternum bare ; metathoracic spiracle 

 without setulose overlying hairs 2. 



2. Hypopleura with hairs on upper margin 



in front of spiracle ; scutellum without 



hairs on sides Papuaia, gen. nov. 



Hypopleura bare ; scutellum with hairs 

 on sides which invade ventral surface 

 laterally Spilopteromyia, gen. nov. 



Limnojihora spreta, sp. n. 



Male. — Black, slightly shining, with dense whitish pruin- 

 escent markings on thorax and abdomen. Thorax with 



